linux-kernel - [PATCH net 2/3] lib: introduce upper case hex ascii helpers

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Message-Id: <1379093833-4949-3-git-send-email-nautsch2@gmail.com>
Date:	Fri, 13 Sep 2013 19:37:12 +0200
From:	Andre Naujoks <nautsch2@...il.com>
To:	davem@...emloft.net, Andrew Morton <akpm@...ux-foundation.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Arnd Bergmann <arnd@...db.de>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Vladimir Kondratiev <qca_vkondrat@....qualcomm.com>,
	Jason Baron <jbaron@...hat.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org
Cc:	linux-can@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH net 2/3] lib: introduce upper case hex ascii helpers

To be able to use the hex ascii functions in case sensitive environments
the array hex_asc_upper[] and the needed functions for hex_byte_pack_upper()
are introduced.

Signed-off-by: Andre Naujoks <nautsch2@...il.com>
---
 include/linux/kernel.h | 11 +++++++++++
 lib/hexdump.c          |  2 ++
 2 files changed, 13 insertions(+)

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 482ad2d..672ddc4 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -439,6 +439,17 @@ static inline char *hex_byte_pack(char *buf, u8 byte)
 	return buf;
 }
 
+extern const char hex_asc_upper[];
+#define hex_asc_upper_lo(x)	hex_asc_upper[((x) & 0x0f)]
+#define hex_asc_upper_hi(x)	hex_asc_upper[((x) & 0xf0) >> 4]
+
+static inline char *hex_byte_pack_upper(char *buf, u8 byte)
+{
+	*buf++ = hex_asc_upper_hi(byte);
+	*buf++ = hex_asc_upper_lo(byte);
+	return buf;
+}
+
 static inline char * __deprecated pack_hex_byte(char *buf, u8 byte)
 {
 	return hex_byte_pack(buf, byte);
diff --git a/lib/hexdump.c b/lib/hexdump.c
index 3f0494c..8499c81 100644
--- a/lib/hexdump.c
+++ b/lib/hexdump.c
@@ -14,6 +14,8 @@
 
 const char hex_asc[] = "0123456789abcdef";
 EXPORT_SYMBOL(hex_asc);
+const char hex_asc_upper[] = "0123456789ABCDEF";
+EXPORT_SYMBOL(hex_asc_upper);
 
 /**
  * hex_to_bin - convert a hex digit to its real value
-- 
1.8.4.rc3

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